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July 26, 2026ACS Macro LettersOpen Access

Stiffness Tuning and Ductility Enhancement of Semicrystalline Polymers by Incorporating Miscible Noncrystallizable Blocks

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Authors

KGKatherine M. GunterRRRichard A. Register

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Overview

Randomized trial investigates mechanical properties in semicrystalline polymers, suggesting enhanced ductility and stiffness tuning through specific block incorporation.

Key Points

  • The study aims to understand the mechanical behavior of diblock copolymers and improve their stiffness and ductility.
  • Investigated mechanical behavior of hydrogenated poly(norbornene-b-substituted norbornene) diblock copolymers.
  • Analyzed the effects of different compositions, including 20 wt % glassy block in the amorphous layer.
  • Examined strain-hardening moduli to understand ductility mechanisms.
  • Yield stress and Young's modulus are enhanced with 20 wt % glassy block incorporation.
  • Diblock copolymers showed a nearly 4× decrease in minimum tie molecule fraction for ductility compared to N homopolymers.
  • Ductility improved regardless of substituted norbornene block being glassy or rubbery.

Cite This Study

Gunter et al. (2026) studied this question.

synapsesocial.com/papers/6a65a3e4d3aea3239cd76bd2https://doi.org/10.1021/acsmacrolett.6c00295
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